Bucket lip



May 8,1923. 'HAMAQ J. W. PLANT BUCKET 1,1?

Filed Sept. 15 1920 2 Shams-Sheet l May 8, 1923. 3,45413486 J. Wv PLANT BUCKET LIP Filed Sept. 13 1920 2 ShGQThB-Shmt 2 rivets of all strains incidental to 7 JOHN W. PLANT, OF SAN MATEO, CALIFORNIA, ASSIGNOR TO CAN MANGE STEEL COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF MAINE.

BUCKET LIP.

Application filed September 18, 1920. Serial No. 409,906.

To all whom it may concern:

Be it known that I, JOHN W. PLANT, a citizen of the United States, residing at San Mateo, in the county of San Mateo and p 5 State of California, have invented certain new and useful Improvements in Bucket Lips, of which the following is a specification.

My invention relates to dredge buckets,

1 and particularly to a construction wherein a removable lip may be supported on the edge of a bucket in such manner as to be readily replaceable as the same is worn out and so supported as to relieve the connecting digging. To those skilled in the art, it will be apparent that my invention pertains to dredge buckets that are adapted to be connected together to form an endless chain for support by a boom. Buckets of this type vary in size and also in weight, the capacities of the bucket running from a few cubic feet to several cubic yards. Consequently the weight of the buckets of the lower portion of the chain is transmitted to the cutting edges of the lips, which weight is such as to push in the lip in the-middle, spreading the outer ends.

In my invention the lip is connected to the bucket by means of two flanges which engage the inside and outside of the upper edge of the bucket, the inner flange being extended for a suitable distance to take up the wear on the inside of the bucket as the material is scooped up therein, and the outside flange -extending far enough around the outside of the bucket to prevent wear on the bucket proper.

()ne of the objects of my invention is to provide a dredge bucket construction wherein a digging lip may be attached to a dredge bucket in such manner that all of the di ging strains are transferred to the b0 y through abutting shoulders and not through the means connecting the lip to the body.

Another object is to provide a dredge bucket lip possessing the greatest possible strength and wearing qualities and one which will satisfactorily protect the inside and outside of the cutting edge of the bucket and prolong the life thereof.

A further object of my invention is to improve dredge bucket-lips for successful commercial use.

I have shown the preferred form of my invention in the accompanying drawings, wherein Figure 1 is a top plan view of a dredge bucket dipper pf the kind adapted to be used in chain buckets and provided with a lip embodying my invention;

Figure 2 is a vertical section through the dipper of Figure 1. i

Figure 3 is a bottom plan view of a lip embodying my invention, in which the out-- er flange does not extend the same distance as does the inner flange.

Figure 4c is a section taken in the plane of the line 4-4 of Fi re 3.

Figure 5 is a section taken in the plane of line 5-5 of Figure 3.

The dipper body is indicated by the referencecharacterfi and includes the usual top and bottom attaching ears 6 and 7, these being provided with suitable bushings 8 and- 9 for formation into bucket chains by pivot pins passing through the ears of adjacent dippers. The cutting edge of the dipper body 5 is provided with a shoulder 10 which is'preferably on the exterior of the body and below the edge 11 thereof. A lip 12 is attached to the body 5 by rivets 13. The lip of my invention has its rear ed e provided with a groove 14, the size and s ape of the same being such as to receive the forward edge of the dipper bucket i and to permit the rear edge of the outer wall 15 of the lip to abut the shoulder 10 formed in the dipper body and inner wall 16 to overlie the inner surface of the forward margin of the dipper body. It will therefore be observed that all digging strains imparted to the lip 12 will be transferred to the bod 5 through the shoulder at 10, removing igging strains from the rivets 13, co uentlv prolonging the life of dredge bucket ippers.

In addition to the above features my construction preventsany tendency of the lip to spread under severe digging conditions, for.

tion by the lip, as the lip is provided with a band of metal inside the dipper which continues through the length of the lip.

It may here be observed that the embodiment of the invention shown is applied to dredge buckets of the type adapted to be connected together to form a chain of buckets, and the movement of which is in the plane of the section of Figure 2. Furthermore, such a construction takes all the wear on the lip, removing it from the dipper body proper. Also the weight of the body of the bucket bearing on the rear edge of the cutting lip serves to push it into the material being dug and as the rivets are released from all strain, no detrimental eflect is sufiered by reason of this action.

It will be understood that buckets of this thereto, as I contemplate'changes in form and proportion of parts and the substitution of equivalents as circumstances may suggest or render expedient, Without departing from the spirit of my invention.

I claim:

l. A dredge bucket lip or cutting edge having two rearwardly extending flanges, one adapted to fit inside the body of the bucket, and the other on the outside thereof; said flanges being provided with aligned openings adapted to receive rivets passing through both flanges and the intervening portion of the bucket.

2. A dredge dipper bucket construction,

including in combination with a dipper body, a cutting lip therefor having its rear edge provided with concentricall arranged flanges defining a groove adaptev to receive the forward edge of the bucket, one of said flanges adapted to overlie the inner surface of the forward margin of the bucket to protect the same from wear, the other flange adapted to protect the outer surface of said margin of the bucket, and means passing through said flanges and margin for securing said lip to said bucket.

ied at San Francisco, this 2nd day of September, 1920.

JUHN W. PLANT. 

